DTC 12

Diagnosis code 12 Pre-stroke servo system faulty
















Service standards







Service procedure

[2] Inspection of pre-stroke actuator
Inspect the following points and if any fault is found, have the unit inspected and repaired by a ZEXEL service station.

NOTE: Inspection of pre-stroke actuator 2 must be carried out when the engine is cold.






1. Inspection at connector point
- Measure resistance between terminals 2-3, 1-3, 1-2 and 4-5.







2. Inspection of pre-stroke actuator body
- Remove cover A from pre-stroke actuator 2.

CAUTION:
- Remove only cover A from pre-stroke actuator 2, never remove the actuator body itself. If the actuator is removed, it requires special tools to replace and adjust it.
- When removing cover A, do not exert excessive force on prestroke actuator 2 with your hands or by treading on it, etc.

- Measure resistance between terminals A-C, B-C, A-B and D-E.







3. Inspection of continuity between pre-stroke actuator and connector
Make sure that continuity exists between terminals as listed in the table below.












4. Inspection of copper plate mounting nut
Check that copper plate mounting nut B was not loosened when the cover of pre-stroke actuator 2 was removed.
If nut B is loose, tighten it.